public class Test4 {
    public static void main(String[] args) {
        int count = 0;
        for (int i = 1; i <= 100 ; i++) {
            if (i / 10 == 9){
                count++;
            }
            if (i % 10 == 9){
                count++;
            }
        }
        System.out.println(count);
    }
}

